/Engine/Source/Editor/UnrealEd/Public/DragAndDrop/ClassDragDropOp.h
class FClassDragDropOp : public [FDragDropOperation](API\Runtime\SlateCore\Input\FDragDropOperation)
TArray<TWeakOb...
ClassesToDrop
The classes to be dropped.
FText
HintText
Adding hint text to all drag drop operations that drop locations could set, and the decorator could report.